Edited from an Arlington Park releaseArlington Park's small but select field in Saturday's grade II Washington Park Handicap received a boost of quality with the addition of Susan & John Moore's Iron Deputy, a 2 1/2-length winner of Belmont's grade II Brooklyn Handicap at last asking June 14. In the Brooklyn, run at nine furlongs, Iron Deputy led every step of the way, which would seemingly make him a formidable rival for Stronach Stables' Phantom Light, the Canadian invader who also prefers the front end.Prior to the Brooklyn, Iron Deputy won by an allowance race by 11 1/4 lengths May 4 at Aqueduct when leading in all but the first strides, and because Adele Dilschneider & Claiborne Farm's Flatter, another Washington Park contestant, also appears more comfortable on the front end, a legitimate speed duel seems set for Saturday's headliner. Stonecrest Farm's Perfect Drift, the starting highweight Washington Park contestant who came from off the pace to capture to capture Churchill's Stephen Foster Handicap (gr. I) June 14, might have the perfect running style for the Washington Park 'Cap, which with its $400,000 purse will be the richest race offered to date during Arlington's present season. However, Perfect Drift must shoulder 120 pounds Saturday and carry the package over the mile and three-sixteenths distance, while in with 115 pounds is Patricia Pavlish's Aeneas, who has that same late-running style and is likely to be somewhat overlooked in the wagering.